The 30W48B is a 48mm (48-400) black electrolytic tinplate (tin coated steel) cap with a white pulp/polyethylene liner, typically used with glass bottles, jars and jugs. This continuous threaded (CT) cap has a black exterior with a gold interior and gold knurled edge. White pulp/polyethylene lined metal caps are a great general purpose closure. They are ideal for powders and non-acidic food products and consumer products such as jar candles and honey.

Electrolytic tinplate caps are highly sought-after metal closures that are sometimes referred to as tin coated steel caps, which are manufactured from 73 lb. - 80 lb. x .20 lb. electrolytic tinplate metal. The coatings on these caps are FDA Compliant and contain no heavy metals and the tooling meets ISBT standards. The metal itself has been sized, coated, varnished, and waxed. Tin plate steel is sometimes used in place of lightweight mirrors due to its shiny or lustrous like mirror appearance. Tin-plate steel is available in various color options such as, white, gold, red, and yellow and is more competitively priced than other options. Most tinplate steel metal caps are colored and have a uniform color and coating application on the closure surface area; whereas tin coated steel caps need a protective coating because they can corrode easily.

Pulp and polyethylene liners are coated with bleached kraft extrusion on one side with white high density polyethylene (HDPE) on the other side. These white liners have been laminated to pulp and provide good chemical resistance. Common applications for pulp/polyethylene liners are use with water-based adhesives, household ammonia, liquid antacid, auto cleaners, mouthwash, lemon juices, syrups and more.


This information has been provided as a general guide. It is the customer's responsibility to select the proper container for product and application compatibility. The Cary Company does hereby disclaim any and all warranties, expressed or implied, including any implied warranty of merchantability or fitness for a particular purpose or use. We are not responsible for consequential damages arising from customer's selection and use of containers, container and label dimensions, and/or closures supplied by us.

Additional Information

More Information
Neck Width48 mm
Neck Finish48-400
Liner CompatibilityGlass
FDA CompliantYes
Dimensions2.015" Outside Dia. (Curl) x .415" H
Case Pack3,700 ea.
Pallet Pack115,200 ea.
Case Weight65 lbs.
Case Dimensions23" L x 17" W x 17" H
Country of ManufactureUnited States
Q & A
Customer Questions
Would these lids fit standard baby food jars?
Thank you for your inquiry. These lids would fit any 48mm diameter, 48-400 neck finish container, such as Part #30WF16, 16 oz. French Square Glass Jar, 48mm 48-400 . Once you determine the size diameter and neck finish of your container, you can pair it with any compatible cap. Thank you for choosing The Cary Company.
Can you ship internationally? Where are you located?
The Cary Company online ordering platform is only set up to ship within the United States. For international shipments, please contact us at 630.629.6600 or Sales@thecarycompany.com, and we will be happy to process your order. Our main warehouse and office are located in Addison, Ill. We also have warehouses in across the United States that you can see here. Thank you for choosing The Cary Company.
Which metal caps for glass containers can withstand high temperatures?
Caps made of electrolytic tinplate (tin coated steel) with a plastisol liner are recommended to use when heat is required.
What types of glass containers are compatible with this metal cap?
This metal cap is compatible with other glass bottles, jars and jugs that share the same neck finish size.
Is this metal cap for glass FDA-approved?
These metal closures are FDA approved and available in aluminum or electrolytic tinplate (tin coated steel).
Is this metal cap for glass containers recyclable?
Yes, because this cap is made of metal, it is recyclable.
What kind of caps do you offer that’s compatible with steel containers?
The Cary Company offers standard metal and plastic-overcap metal caps that are available in Delta F-style, Delta cap, Alpha cap, and Beta cap styles.
What kind of metal cap liners do you offer that’s compatible with steel containers?
Each cap may also be lined with a solvseal liner, pulp and foil liner, pulp and solvseal liner, foil liner, or an aluminum liner.
Is this metal cap for steel containers recyclable?
Yes, because this cap is made of metal, it is recyclable.
If i were to use the caps along with glass bottles to store juice, would they eventually start to rust? and are there any plastic free cap recommendations that would be ideal for storing raw juice.
Thank you for your inquiry. This cap is typically used for glass bottles, jars, and jugs. We cannot guarantee the product will work for certain applications. We recommend requesting samples to test prior to purchase. Thank you for choosing The Cary Company!
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